Question

I am developing android program that have a lot of supported screen sizes and I have different layout for each screen , but some layout have extra buttons and views so I want to change the code according to the current used device for example when I use tablet I want to use different main.java code
how can I do that?

Answer 1

You can add a value in the res folder for that:

- values-large
    * booleans.xml
- values
    * booleans.xml

Each booleans.xml should have a different value:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="isTablet">true</bool>    
</resources>

Instead of a boolean “isTablet”, you can separate by sizes depending on what you need. You can then get this value and use it in your code:

public static boolean isTablet(Context context) {
    return context.getResources().getBoolean(R.bool.isTablet);
}